Tia has a sample of pure gold (Au). She weighed the sample and the result was 25.0 grams. Tia wants to determine the

number of atoms in the sample. Calculate the number of atoms in 25.0 g of pure gold.

The atomic number of nitrogen is 7. How many protons, neutrons, and electrons make up an atom of nitrogen

What happens to electron pairs when molecule is formed

What is the name for C2H3OH

What was the copernican revolution?

In a hydrocarbon-based combustion reaction, what two molecules are most likely to be products? a. carbon dioxide and water b. sulfur dioxide and zinc oxide c. sulfur dioxide and cyclopentane d. carbon monoxide and hydroxide

Of these gases, which has the fastest-moving molecules (on average) at a given temperature?

What is the oxidation number for zinc? How does zinc's electron configuration account for this oxidation number?

Which of the following experimental observations proved that the idea of matter and mass being evenly distributed in an atom was flawed? A. Less than 1% of the alpha particles went un-deflected through the gold foil. B.

Calculate the energy E of a sample of 3.50 mol of ideal oxygen gas (O2) molecules at a temperature of 310 K. Assume that the molecules are free to rotate and move in three dimensions, but ignore vibrations.

Gasohol is a fuel containing ethanol (c2h6o) that burns in oxygen (o2) to give carbon dioxide and water.